Abstract: To determine a paper splice time when the present web is spliced to a next web for the purpose of a so-called lot shift (or a paper shift) in an apparatus for producing corrugated paper boards, not only a length of each core but also a length of each web have been hitherto measured. In view of the current circumstance that a measuring operation is accompanied by various errors and an order is often given with a small lot in size, determination of a paper shift time is made at an operator's discretion which depends on his skill. In practice, there often arises a malfunction that the operator erroneously determines the time when a paper shifting operation is to be performed.

Abstract: An apparatus for conveying a roll such as a paper web roll set on the roll stand of a corrugator to a predetermined location at low speed, with a small initial force and without scratches or other damage to the roll. The apparatus includes a plurality of flat plate-shaped bases arranged end-to-end in the direction in which the roll is conveyed, a plurality of fulcrum shafts each passing through shaft holes in a corresponding base to allow each base to pivot on its shaft, raising and lowering units beneath each base to raise and lower the base, a load sensing unit below the downstream side of each base to detect a load exerted on the base, and a controller responsive to a signal from the load sensing unit to control raising and lowering units at a subsequent stage. When the bases are assembled together with the fulcrum shafts, a conveyance path for conveying the roll to the predetermined final location at low speed and without any acceleration is formed.

Abstract: An apparauts for placing a printer-slotter in positions where it processes sheets of corrugated paper. The printer-slotter includes a feeding unit for feeding the sheets, processing units, and differentials connected with the processing units. The apparatus comprises a position detector for detecting the position of the kicker of the feeding unit, positioning controllers connected with a central control unit (CCU), and sensors detecting the angular positions of the rotating cylinders included in the printing units and in the creaser-and-slotter unit. The sensors are connected with the positioning controllers, respectively. The CCU compares the position of the kicker with the positions at which the processing units process the sheets. The CCU controls the differentials in such a way that the position of the kicker corresponds to the positions at which the processing units process the sheets.

Abstract: A corrugated cardboard producing machine has a preheater for heating a corrugated cardboard sheet of original paper or single face type corrugatd cardboard sheet in each of various processing stages for producing a corrugated cardboard by bonding a liner paper onto a corrugated central core paper. The preheater is provided with a lap amount adjusting tool whose insertion amount between a circumference of a roll of the preheater and the original paper or the single face type corrugated cardboard is adjustable. The lap amount adjusting tool is movable along the circumference of the roll of the preheater.

Abstract: A web feeding device for a corrugator including a mill roll stand consisting of two swing arm mechanisms with each swing arm mechanism having a pair of swing arms supported on a pivotal shaft which can be turned with a predetermined angle to the positive and negative directions relative to a perpendicular line extending upwardly from the pivotal shaft and disposed such that the pivotal shafts thereof may be parallel to each other, a conveyor for transporting the web rolls disposed between the two swing arm mechanism to extend parallel to the pivotal shafts and two web roll transporting conveyors disposed as outer areas relative to the swing arm mechanisms, respectively, to extended relative to the pivotal shafts.

Abstract: An anvil cylinder for use in a processing machine, which is installed in parallel with a cylinder equipped with a processing tool such as a die cutting tool. The anvil cylinder comprises a heating means by which the cylinder is so heated as to make dry the ink transferred thereonto from a sheet to be processed thereby.

Abstract: Method and apparatus for synchronously controlling a printing speed of a belt-type printing machine including a plate cylinder, a tension roll for adjusting a distance between the plate cylinder and the tension roll, and an endless printing belt detachably wound around the plate cylinder and the tension roll. According to the present invention, sprocket wheels each having thereround sprocket pins for engaging perforations of the endless printing belt are rotatably mounted on the plate cylinder so that the sprocket wheels have no function of driving the endless printing belt and are only intended to guide the belt along a predetermined path and prevent it from lateral movement relative to the plate cylinder. The endless printing belt is driven only by a frictional force between the peripheral surface of the plate cylinder and the belt. With independently detecting the number of rotation of the sprocket wheels, i.e.

Abstract: A single facer machine is disclosed which comprises a first corrugating unit having a pair of upper and lower rolls, a second corrugating unit also having a pair of upper and lower rollw, and a common pressure roll disposed in operative association with both the first corrugating unit and the second corrugating unit. The single facer machine is characterized in that either of the combination of the first corrugating unit and the pressure roll or the combination of the second corrugating unit and the pressure roll is selectively operated to form a single-faced corrugated board.

Abstract: An apparatus for positioning a pair of sheet guides for guiding a conveyed sheet therebetween. A pair of operation cylinders moves the pair of sheet guides toward and away from each other so as to contact the sheet. A pair of preset blocks is supported onto a screw rod including portions having mutually opposite threads thereon so that they are engaged with the corresponding opposite threads so as to move toward or away from each other along the screw rod according to the direction in which the screw rod is rotated by a motor. Each preset block includes a radial engagement protrusion. A positioning cylinder is provided to each sheet guide. The positioning cylinder includes an actuated piston which is engaged with the radial engagement protrusion at its protruded position to position the corresponding sheet guide at the desired position.

Abstract: The present invention is directed to a method and apparatus for bonding a printing plate to a flexible endless printing belt passed around and between a plate cylinder and an adjustable cylinder. Marked on the surface of the printing belt are a first reference line perpendicular to a center line of the printing belt and a second reference line parallel to said center line. Set below the transparent plate is a third reference line parallel to the longitudinal reference line. A turned over printing plate is placed on said transparent plate at an intersection of the third and transverse reference lines and has an adhesive on its rear surface. The first marked reference line on the surface of the printing belt is aligned vertically with said transverse reference line. The plate cylinder is rotated to bring the first marked reference line to a position just above said transverse reference line.

Abstract: A waste stripping unit is disposed downstream from a die cutter for cutting a sheet of paperboard into a product and waste and includes an upper roller having a male die corresponding to the waste of the sheet and a lower roller having a female die which cooperates with the male die on the upper roller to separate the waste from the product during passage of the sheet between the rotating upper and lower rollers.

Abstract: In a printing press, at least two inking arrangements are disposed relative to a plate cylinder so that one of the inking arrangements is moved toward the plate cylinder for application of ink onto the plate cylinder while the other is in a rest position.

Abstract: A device for spreading paste on paperboard in a corrugated board manufacturing apparatus is herein disclosed. The device comprises a supplier for supplying liquid paste, a roller for spreading the liquid paste on tops of core paper to be pasted with linerboard, a member for controlling the volume of the liquid paste, a paste feeding member provided under the supplier downwardly inclinedly toward the paste spreading roller to define a passage for the liquid paste, at least a pair of movable end plates provided in the forward end of the paste feeding member and defining a certain clearance between the upper surfaces thereof and the paste spreading roller and a feed portion defined by the end plates to communicate with the passage. The width of the feed portion is adjustable by movement of the end plates in conformity with the width of the core paper between a minimum effective width and a maximum effective width.

Abstract: A paper web is passed between a pair of first and second corrugating rolls to form corrugations therein. The second corrugating roll is provided with a plurality of longitudinally spaced annular suction grooves in communication with a suction device from which subatmospheric pressure is applied through the annular suction grooves to the corrugated web, while it is travelling around the second corrugating roll, retaining the corrugations in the flutes of the roll.

Abstract: A plurality of longitudinally spaced annular suction grooves are formed in one of a pair of corrugating rolls on the peripheral surface thereof and a plurality of suction manifolds are formed in the corrugating roll and extend longitudinally of the roll in intersecting relationship with the annular suction grooves.